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Question

Find the term independent of x in (32x213x)9

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Solution


General term Tr+1=9Cr((3x22))r((13x))9r=9Cr((32))rx2r((13))9r((1x))9r=9Cr((32))r((13))9rx2rxr9=9Cr((32))r((13))9rx3r9

as we need term independent of x

x3r9=x0or3r9=0r=3term=T3+1=t4(4thterm)


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